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Although the RKO Picture version of the Tarzan yell ostensibly was that of Weissmuller, different stories exist as to how the Tarzan Yell was created. Many speculate that a man by the name of Lloyd Thomas Leech was the original voice behind the Metro-Goldwyn-Mayer Tarzan Yell. He was an opera singer during the 40's and 50's and into the 60's. He won the Chicagoland Music Festival on August 17, 1946. He went on to sing throughout the U.S. touring with several opera companies. There are recordings of him recalling his account of how the Tarzan yell was created. His story is supported by his children and grandchildren.[1] According to the newspaper columnist L. M. Boyd (circa 1970), "Blended in with that voice are the growl of a dog, a trill sung by a soprano, a note played on a violin's G string and the howl of a hyena recorded backward." According to Bill Moyers, it was created by combining the recordings of three men: one baritone, one tenor, and one hog caller from Arkansas.[2] Another widely published notion concerns the use of an Austrianyodel played backwards at abnormally fast speed. But Weissmuller claimed that the yell was actually his own voice. His version is supported by his son and by his Tarzan co-star, Maureen O'Sullivan.[citation needed]

In the 1999 Disney animated film based on the Tarzan franchise, the character lets out an updated version of this yell at various moments.

The Tarzan yell is often used for comic effect in later, unrelated movies, particularly when a character is swinging on vines or doing other "Tarzanesque" things. The sound clip used in the Weissmuller films has also been exclusively used for animated series appearances of Tarzan, and in the Tarzan television series (1966 - 1968), which starred Ron Ely, rather than having the actor providing Tarzan's voice for the series attempt to imitate the trademark yell. A comical version of this yell was performed by Ray Stevens in his 1969 novelty hit "Gitarzan". It was even used in the 1981 film Tarzan, the Ape Man. The yell is heard at Carolina Hurricanes home games. Comedienne Carol Burnett would do the yell on request during a question and answer weekly session on her comedy sketch series. A version of the yell even appeared in Star Wars Episode VI: Return of the Jedi as the character of Chewbacca swings on a vine towards an Imperial Scout Walker on the forest planet of Endor. The yell is also heard in the third prequel Star Wars Episode III: Revenge of the Sith in a similar scene of a wookiee swinging onto an attacking droid tank. It was also used to dubious comic effect in the James Bond film Octopussy in 1983.

Registration Numbers: 2210506; 3841800; 4462890.Registration Dates: December 15, 1998; August 31, 2010; January 7, 2014.Description of Mark: The mark consists of the sound of the famous Tarzan yell. The mark is a yell consisting of a series of approximately ten sounds, alternating between the chest and falsetto registers of the voice, as follow -

a semi-long sound in the chest register,

a short sound up an interval of one octave plus a fifth from the preceding sound,

a short sound down a Major 3rd from the preceding sound,

a short sound up a Major 3rd from the preceding sound,

a long sound down one octave plus a Major 3rd from the preceding sound,

a short sound up one octave from the preceding sound,

a short sound up a Major 3rd from the preceding sound,

a short sound down a Major 3rd from the preceding sound,

a short sound up a Major 3rd from the preceding sound,

a long sound down an octave plus a fifth from the preceding sound.

Recognition of the trademark's registration within the European Union is uncertain. In late 2007, the Office for Harmonization in the Internal Market (OHIM) determined that attempts by ERB, Inc. to maintain such trademark must fail legally, reasoning that "[w]hat has been filed as a graphic representation is from the outset not capable of serving as a graphic representation of the applied-for sound ... The examiner was therefore correct to refuse the attribution of a filing date." Regardless, the trademark registration was updated in 2010 (to include slot machines),[4] and 2014 (to include online use).[5]

Tarzan's yell is used as a melodic refrain in the Baltimora single "Tarzan Boy".[8] This refrain ironically plays in place of an ordinary Tarzan yell when Haru climbs and struggles to keep his balance on the top of a palm tree in Beverly Hills Ninja. The refrain was also used in a 1993 jungle-themed advert for Listerine's Cool Mint mouthwash.[9]